Privacy Policy

Wonderwallpaper Chrome Extension
Last Updated: November 9, 2025

1. Introduction

Welcome to Wonderwallpaper ("we," "us," "our," or "the Extension"). We are committed to protecting your privacy and ensuring you have a positive experience on our extension. This Privacy Policy explains what information we collect, how we use it, and your rights regarding your data.

This Privacy Policy applies solely to the Wonderwallpaper Chrome Extension. Please review this policy carefully. By installing and using the Wonderwallpaper extension, you agree to the terms outlined in this Privacy Policy.

2. Data We Collect

2.1 Data Stored Locally on Your Device

Wonderwallpaper stores the following information exclusively on your device using Chrome's Storage API:

• User Preferences: Calendar layout, display settings, font sizes, color customization, opacity levels, and other UI preferences
• Wallpaper Selections: Your chosen wallpapers from our curated gallery
• Custom Wallpapers: Wallpapers you upload directly to the extension (stored as data URLs)
• Cache Data: Temporary data to improve performance and reduce load times

2.2 Data We Do NOT Collect

Wonderwallpaper does NOT collect or transmit:

• Your browsing history
• Personal information (name, email, address)
• Usage analytics or telemetry data
• Calendar events or personal data (even when Google Calendar integration is available)
• IP addresses or location data
• Device identifiers

2.3 Optional Google Calendar Integration

If you choose to connect your Google Calendar to Wonderwallpaper:

• Calendar integration is performed entirely on your device using standard OAuth 2.0 authentication
• Your Google account credentials are handled directly by Google's authentication system—we never see or store them
• Calendar event data is fetched from Google and cached locally on your device
• We do NOT store or transmit your calendar events to any servers
• You can disconnect Google Calendar at any time through the extension settings

3. How We Use Your Data

All data collected is used exclusively to:

• Provide and improve the functionality of the Wonderwallpaper extension
• Save your preferences and wallpaper selections across Chrome sessions
• Synchronize your settings across devices where you're signed into Chrome (using Chrome Sync)
• Display cached wallpapers and calendar overlays according to your customization
• Enhance your user experience through local processing and caching

We do NOT use your data for:

• Marketing or advertising purposes
• Profiling or behavioral analysis
• Sharing with third parties (except as described in Section 4)
• Training machine learning models
• Selling to data brokers

4. Data Storage & Security

4.1 Local Storage

Your data is stored locally on your device using:

• Chrome Storage API (Sync): Stores preferences and syncs them across your devices if you're signed into Chrome. Data is encrypted in transit by Google.
• Chrome Storage API (Local): Stores sensitive data (like API tokens, if implemented) locally only. Does not sync across devices.

4.2 Data Security

We implement the following security measures:

• All data is stored locally on your device by default
• The extension uses Chrome's official Storage API, which provides encryption and access control
• We do not implement or maintain external servers for user data storage
• The extension is built with Manifest V3, Chrome's most secure extension platform
• No remote code execution vulnerabilities exist in the extension

4.3 Data Deletion

Your data is automatically deleted when:

• You uninstall the Wonderwallpaper extension
• You clear your Chrome browser data (if you select extension data)
• You manually delete individual preferences through the extension settings

You can also manually export and delete your wallpaper selections at any time through the options menu.

5. Third-Party Services

5.1 Google Calendar API

If you enable Google Calendar integration:

• The extension uses Google's OAuth 2.0 protocol for authentication
• Your login credentials are handled entirely by Google—we never see or store them
• Calendar events are retrieved directly from Google's servers and cached locally on your device
• We recommend reviewing Google's Privacy Policy for information on how Google handles your data

5.2 Wallpaper Sources

Wallpapers in the Wonderwallpaper gallery are sourced from licensed and royalty-free providers. These images are:

• Downloaded and processed locally on your device
• Cached locally for performance
• Never transmitted to external servers for analysis or processing

5.3 No Third-Party Tracking

The extension does NOT integrate with:

• Analytics services (Google Analytics, Mixpanel, etc.)
• Advertising networks
• Social media trackers
• Any other data collection services

6. Your Rights & Controls

6.1 Access Your Data

You have full access to all data stored by the extension through:

• The extension's options/settings page
• Chrome DevTools (for advanced users)
• Exporting your wallpaper selections

6.2 Modify Your Data

You can:

• Change any preference in the extension settings at any time
• Delete individual wallpapers or all wallpapers
• Reset all settings to defaults
• Disconnect from Google Calendar

6.3 Delete Your Data

You can delete all data by:

• Uninstalling the extension (automatic deletion)
• Clearing Chrome's cached data (with extension data selected)
• Using the "Reset All Settings" option in the extension

6.4 Data Portability

You can export your wallpaper selections and preferences through the extension's export functionality.

7. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors. We will notify you of any material changes by:

• Updating the "Last Updated" date at the top of this policy
• Posting the updated policy on this page
• In the event of significant changes, we may provide additional notice through the extension or email (if applicable)

Your continued use of the Wonderwallpaper extension following the posting of revised Privacy Policy terms means you accept and agree to the changes.

8. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or your data, please contact us:

Compliance & Standards

This Privacy Policy is designed to comply with:

• GDPR: General Data Protection Regulation (EU)
• CCPA: California Consumer Privacy Act
• Chrome Web Store Policies: Google's privacy requirements for extensions
• Industry Best Practices: Privacy by design and data minimization

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